Reed LX-1102 Dual Display Light Meter with 40 Segment Bargraph Large, dual display, LCD with 40 segment bargraph High resolution and zero adjustment button Light Meter - 400,000 Lux, Dual Display Model LX-1102 Features: Large, dual display, LCD w/ 40 segment bargraph High resolution & zero adjustment button Data Hold, Peak & Memory recall Min/Max function RS232 serial interface Auto shut off & low battery indication User selectable Lux/Fc Includes battery Measuring Range: 0 to 400,000 Lux; 0 to 40,000 Fc Resolution: 0.1 to 100 Lux; 0.01 to 10 Fc Accuracy: +/-3% of reading Power Supply: 1 x 9V battery Dimensions: 7.9 x 2.7 x 1.2" / 200 x 68 x 30mm Weight: 7.76oz / 220g Light meter LUTRON Lux meter LX-1102 à¤Ã×èͧÇÑ´¤ÇÒÁà¢éÁáʧ à¤Ã×èͧÇÑ´áʧ